Pumping Simulated Analysis on Crushed Sand Concrete LIU
Preparation and Application of Self-Compacting Concrete
Self-compacting concrete-filled steel tube is different from ordinary self-compacting concrete in many aspects. According to the demands of on-site construction conditions and construction technology of continuous pumping lift-up method for the project of Huaxi No.1 steel tube arch bridge, property requirements of self-compacting concrete filled steel tube were proposed in this paper.
Leaking behavior of shield tunnels under the Huangpu River
Sep 28, 2013 · The Quaternary deposits in Shanghai primarily consists of a phreatic aquifer group (Aq0) and five artesian aquifers (AqI–AqV) that are separated by six aquitards (AdI–AdVI). In the basin of the Huangpu River, the first artesian aquifer (AqI) is connected to the second artesian aquifer (AqII), forming a 50-m-thick artesian aquifer with a very high groundwater level. The highway tunnels
The study of frost heave mechanism of high-speed railway
Oct 16, 2018 · Due to the rigid deformation limit of high-speed railways, the anti-frost heave design has become a critical concern in seasonally frozen regions. In this study, the authors explained the frost heave mitigation techniques adopted for the high-speed railway between Harbin and Dalian in northeast China and then presented the thermal, deformation, and water content data monitored on the
Prediction of compression and deformation behaviours of
Jun 20, 2020 · Shi JG (2010) Experimental research and computational analysis of recycled aggregate concrete performance. Doctor. Shanghai. Shanghai University (in Chinese) Su CD, Gu M, Tang X, Guo WB (2012) Experiment study of compaction characteristics of crushed stones from coal seam roof. Chin J Rock Mech Eng 31:18–26 (in Chinese)
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Analysis of a deformable fracture in permeable material
Mar 03, 2006 · Patryk Quinn, John A. Cherry, Beth L. Parker, Hydraulic testing using a versatile straddle packer system for improved transmissivity estimation in fractured-rock boreholesEssais hydrauliques au moyen d'un système polyvalent de double packer pour une estimation améliorée de la transmissivité dans les forages en roches fracturéesEnsayos hidráulicos usando un sistema de packer desplegable
Experimental and Numerical Studies of Controlling Thermal
The grade of mass concrete was C35, and vibrators were used for compaction. The cement strength grade was P.0 42.5, the water to cement ratio was 0.42, and the sand ratio (the quantity of sand/the total mass of sand and stone) was 43%. The concrete mix design is detailed in Table1. Table 1. Mix design of concrete (kg/m3).
The properties of hardened original ﬂy ash (OF) or ground ﬂy ash (GF) at a ratio of 30:70 by weight concrete were evaluated with respect to the relative water absorption and was used as a binder to cast concrete without Portland cement. The of aggregates combining the quality and volume of RA.
Analysis of Sensitivity of VCCTL Measurements to Various
composite materials like mortar (cement plus sand plus water) and concrete (cement plus sand plus gravel plus water). The cement powder comes in a range of µm to about 30 m. The similar to the shape of crushed gravel, and can display aspect ratios of up to 3:1. This aspect of randomness is
Concrete pump would be used to transport concrete to staircase formwork, since using head pan or wheel barrow might be inefficient and time consuming. Placing Placing is the process of positioning the concrete in the formwork, these operations employs precautions which includes; 1. Dropping concrete vertically at a mean height from pump 2.
Fresh and Mechanical Properties of Self-Compacting Rubber
Feb 24, 2019 · Increasing amount of waste tires caused huge environment issues in recent years. Recycling concrete is an effective way. In this paper, waste tires are crushed into particles and incorporated in lightweight aggregate concrete to prepare a special concrete (self-compacting rubber lightweight aggregate concrete (SCRLC)). A detailed experimental research of effects of rubber …
Pumping Performance Analysis on Crushed Sand Concrete
By means of laboratory experiment, pump performance of crush sand concretes with different stone powder content and methylene blue value are measured. More stone powder provides better lubrication and better pump performance on low-strength concrete. Paste viscosity increases by increasing stone powder in high- strength concrete and lead to poor pump
IOP Conference Series: Earth and Environmental Science
One of the solutions is to use crushed sand to replace natural sand as aggregate in concrete, especially the study of using crushed sand to make high-strength self-compacting concrete. Crushed sand is an aggregate of angular shape and surface roughness that hinders the self-compacting of the concrete …
A review on the angle of repose of granular materials
May 01, 2018 · For powders, which can be defined as small-sized granular materials subject to cohesion and suspension in a gas, the definition of the angle of repose is frequently linked with the Hausner ratio or the tapped-to-bulk density ratio , and the powders will flow at angles greater than the angle of repose .The angle of repose can also indicate the cohesiveness of the granular material
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Pipe flow of pumping wet shotcrete based on lubrication
Jun 30, 2016 · Wet shotcrete can reduce dust and improve supporting strength, however, safe and efficient pipage is a key technical part of wet shotcrete process. The paper studied the pipe flow law of wet shotcrete based on lubrication layer by build the experimental pumping circuit of wet shotcrete that can carry out a number of full-scale pumping tests. The experimental results show there was a linear